Hello Dr, I Am In The Need To Completely Change

Hello Dr,
I am in the need to completely change my sexuality. that is that i want to become asexual. could u tell me if its possible for me to become asexual? and if yes, how should I start this change. I want to change my sexuality because i am sick of being exposed to pain, vulnerability, and tired of feeling emotional wants, and needs as well as romance. i simply need to change.

Thanks,
Pepper